Cochlear implantation in a child with posttraumatic single-sided deafness
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Abstract
Cochlear implantation has become a standard therapy for children with bilateral profound hearing loss, resulting in substantial and sustainable benefits for the development of expressive and receptive and expressive language skills and cognition. During the last few years, audiologic and otologic criteria for cochlear implantation have been expanded. Recently, patients with profound single-sided deafness with or without tinnitus have received cochlear implants despite normal to near-normal hearing on the contralateral side. This indication, however, has thus far been restricted to adult patients. Although it is known that unilateral hearing has an impact on social-emotional development in children, otologic surgeons have been reluctant to treat children with single-sided deafness with a cochlear implant. We report here on a case of successful cochlear implantation in an 8-year-old boy with acute single-sided deafness due to a lateral skull-base fracture, after an MRI showed signs of imminent fibrosis of the inner ear with possible prevention of cochlear implantation at a later stage. There was normal hearing in the contralateral ear. The child showed rapid development of speech discrimination in the implanted ear, improvements in sound localization and speech perception in noise, and a high degree of patient satisfaction. This experience may encourage using this therapeutic approach in children with chronic profound single-sided deafness.
Keywords
Child Cochlear implant Hearing loss Single-sided deafness (SSD) Temporal bone fracture Unilateral hearing loss (UHL)Abbreviations
- ADE
Angle-detection error
- BAHA
Bone-anchored hearing aids
- CI
Cochlear implant
- CISS
Constructive interference steady-state sequence
- CROS
Contralateral routing of sound
- CT
Computed tomography
- dB
Decibel
- HL
Hearing level
- MRI
Magnetic resonance imaging
- nHL
Normalized hearing level
- OLSA
Oldenbourg sentence test
- SDS
Speech discrimination score
- SPL
Sound pressure level
- SSD
Single-sided deafness
- SRT
Speech reception threshold
- UHL
Unilateral hearing loss
Notes
Acknowledgments
The authors wish to thank Jill Firszt, St. Louis, Missouri, USA, and John Dornhoffer, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA, for comments on the manuscript.
Conflict of interest
T. Rahne has a research cooperation with Cochlear Ltd. (Hannover, Germany) including reimbursements for research and traveling costs. This work was not sponsored by Cochlear Ltd. S. Plontke is a consultant to Otonomy, Inc., San Diego, CA. This work was not sponsored by Otonomy, Inc.
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